Leonardo design attributed

"design for the mona lisa made about 1499 and attributed to leonardo da vinci", "dimensions of canvas 25. 50 by 20. 50 inches", "in the collection of giuseppe vallardi, florence"a charcoal and graphite study of the mona lisa attributed to leonardo is in the hyde collection, in glens falls, ny. Attributed to leonardo da vinci , italian (1452-1519), study of the mona lisa, c. 1503, charcoal and graphite, 24 1/8 x 20 1/8 in. , the hyde collection, 1971. 71 probably a copy of the painting and not what they thought it was. W:talk:lisa_del_giocondo#mona_lisa_drawing. Date: thought to be c. 1499, more likely c. 1503.